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@kennybiel48324 жыл бұрын
I realize you probably don't want to discuss politics, but unfortunately politics plays too large of a role in setting speed limits, even more so than sound engineering principles. You could have mentioned the 85th percentile rule though. That is, in civil engineering, the safest speed on a roadway is the speed at which 85% of the public travels (regardless of posted speed limits) at or below.
@juantransportador4 жыл бұрын
Kenny Biel, you are correct, in engendering that is not included, the speed limit in some places is dictated by the police.
@Ron.S.4 жыл бұрын
Politicians are the new traffic engineers. Safe? Smart? Efficient? Who cares as long as they are popular
@DavidLeon140m34 жыл бұрын
but yet , last year Panhandle got a traffic light
@awsaws224 жыл бұрын
Please make video about how does steam engine work
@bobthudpucker77304 жыл бұрын
True story: Where I live, the main street is perfectly straight the whole way through the town. It used to have a speed limit of 40 MPH. Then a family whose house was right on Main Street complained about the speed and asked the city if they could lower it. The city looked into it... and changed it to 45 MPH.
@eac-ox2ly4 жыл бұрын
Lmao
@MrNicoJac4 жыл бұрын
"Because FUCK YOU, this is America baby!" 😝
@werdnaokczub70214 жыл бұрын
Haha! f@#%ing Karen!
@garrisonsan4 жыл бұрын
85th percentile speed is usually how the prima facie (posted) limits are set, within certain limits
@AsbestosMuffins4 жыл бұрын
did something like this near me, the cops used to have a lovely zone where it went from 50 mph to 35 mph in about 20 feet, now it goes 50 to 40. U don't see them parked at the edge of town that often anymore
@EstebanFelipe73 жыл бұрын
Practical Engineering: There are many factors that come into play when designing a highway My city: We don't do that here
@koltonkotoski76803 жыл бұрын
Your city and my state lol
@infraprojects37513 жыл бұрын
kzbin.info/door/SiaHKyoxSyoc8Rzb2thXJA
@martymcfly31533 жыл бұрын
Why not in virginia they evacuated entire neighborhoods not giving a f*** for a walmart
@TMacDo2433 жыл бұрын
@@JackHudler well you can but....
@kylealexander70243 жыл бұрын
@@martymcfly3153 i think u mean walmart bought out all the properties. U dont have to sell.
@spikeevans14883 жыл бұрын
I recall, as a young engineer in the '70s, being told that interstates were designed to hide changes of direction at the crest of slopes to make the road appear straight. Also one of my pet peeves with modern highways are the spirals on exit ramps that sneak up on the driver and all of a sudden they are going too fast; a big problem on a motorcycle.
@nanszoo30923 жыл бұрын
I did that in an 87? T-bird, (one of the last large cars), driving my daughter home from taking her graduation pictures. Luckily that car had a low profile. We did a 270 in the middle of the 2-lane ramp but stayed on the road. She learned a valuable driving lesson that day although I'm not sure what exactly it was. Maybe don't panic and slow down for ramps? There were a lot of trees and stuff hiding the curve. Really. I can't imagine that on a motorcycle. I was on one that wiped out on a flat curve in town once. And I was wearing shorts. Ow.
@treeguyable3 жыл бұрын
Never a problem on my motorcycles, just a fun curve, in a county full of straight roads. I have 3 big vtwin cruisers, an R1, and drive a dump truck, and a Hoda Civic. Love the difference between them all.
@Anthonest12 жыл бұрын
@@treeguyable Thats an impressive line up. You a contractor or does a company let you drive the dump truck home?
@treeguyable2 жыл бұрын
@@Anthonest1 Just have a little one horse business, but gotta have a dump truck.
@wta1518 Жыл бұрын
At least the spirals are always well-signed where I live.
@ionmaster78734 жыл бұрын
Practical Engineering: How are highways designed? Cities Skylines players: Write that down! Write that down!
@jeffsansome904 жыл бұрын
I love Cities Skylines, to be honest I've only played it on Nintendo Switch, but as a Highway Engineer, I cringe at the on-off ramps, the entry and exit angles are waaaay too high
@tomatosteve34444 жыл бұрын
Jeff Sansome dude lmao same I hate when the off/on ramps are unnaturally bendy or high
@bassdrumflextime12534 жыл бұрын
@@tomatosteve3444 me too
@v13r3r3 жыл бұрын
@@jeffsansome90 what? You dont slam the brakes from 100 to 20 to make a 90 degree turn on your highways?
@orchdork7753 жыл бұрын
@@jeffsansome90 You're a highway engineer?? That's so cool! What do you think about the difference between European roads and American roads? I've read that many European roads have smaller lanes and more curves which requires drivers to stay focused and reduces crashes. How do you ensure that people stay focused when designing highways?
@jordyhellemons69644 жыл бұрын
This man can make anything interesting. He single-handedly brought back my interest in learning about engineering. Legend
@MukulVyas54 жыл бұрын
Soooooo true. I'm a Civil Engineering graduate and due to a monotonous, quality lacking, banal and unfair education system and working culture, I've lost interest but this channel keeps me motivated. I'm so grateful and wish I had a teacher like him. This is how Civil Engineering should be taught.
@mahdizerrouk58944 жыл бұрын
@@MukulVyas5 same here man, i feel you !
@MarcelinoDeseo4 жыл бұрын
I'm a programmer, but any work that requires planning and designing excites me and learn from designers of different fields.
@Phlebas4 жыл бұрын
I'm an engineering drop-out, so for quite some time, I had zero interest in engineering and pretty much avoided the topic at all costs because it brought back some painful memories. But I'm at a point in my life where I have a satisfying career in a completely unrelated field (archaeology), and I find I can actually enjoy these videos and find them interesting.
@meenoomeenoo45784 жыл бұрын
Same here. Never thought I'd be so amused by learning how roads are made. We took everything for granted.
@zan8314 жыл бұрын
In Australia where I live, potholes and kangaroos determine highway speedlimits. Actually almost crashed into a kangaroo whilst passing over a crest as it appeared out of nowhere, just like you said. Thats why I always slow down when I'm going over crests or around tight corners where my sight distance is impeded. It surprises me how fast many people go when they are literally driving blind around these bends/curves.
@NimithChanceson4 жыл бұрын
Or just sue the gov if anything happen
@i_smoke_ghosts4 жыл бұрын
classic!
@jonnyso14 жыл бұрын
Similar thing in Brazil, potholes determine the speedlimits. Although, instead of kangaroos we need to worry about some dude trying to rob you in some strategic locations of the road, in which case the speed limit goes waaay up, it also determines wether you ignore stop signs and trafic lights.
@Anankin124 жыл бұрын
Don't they teach you that in driving school?
@Hipcrostino4 жыл бұрын
@@Anankin12 driver training in Australia is very poor. So most people don't learn this, as their parents who teach them don't know it.
@BiffaPlaysCitiesSkylines4 жыл бұрын
I found this extremely interesting :-)
@himlyk4 жыл бұрын
Now he just needs to explain roundabout curvature geometry!
@akinlajanicolasabidemi2974 жыл бұрын
Lol biffa, I just finished watching your videos
@badboys1744 жыл бұрын
I only watch videos like this because of cities skylines lol
@andrewomboto94584 жыл бұрын
What are you doing here biffa?
@flowersforferdinand3754 жыл бұрын
Biffa!!
@jonescg3 жыл бұрын
I'd love to hear more about railroad engineering - how are new railroad formations settled on? And how do they get the transitions and radii just right? I reckon that would be a fantastic video. Keep up the great work!
@sublivion50242 жыл бұрын
I suggest you look at Gareth Dennis's channel
@wain___6147 ай бұрын
ohhh bro its so cool, i saw one that talked about comparing railway constructions in and the past and present. It was really enticing.
@SunlightAldo4 жыл бұрын
"Not many people think about roads" Me: *a loyal subscriber with post notifications who pesters my friends about why theres cracks in side walks and about all the layers that go into road construction*
@hedgehog31804 жыл бұрын
"Not many people think about roads*" *unless you're a subscriber to this channel then you probably spend hours thinking about a weird highway support you saw.
@josephjackson19564 жыл бұрын
*the average person doesn't think about roads Not the especially observant and smart people that watch this channel ;)
@mehmetyok84344 жыл бұрын
@Flying Speed Brake There are dozens of reasons for it, not that easy. The main reasons are generally badly designed joints and non-uniform base/subbase for concrete pavements.
@RealZynexx4 жыл бұрын
ikr
@doggetay4 жыл бұрын
4:37 "If the superelevation angle is just right, and you're traveling at a right speed, your cup of coffee won't spill around the bend" EUROBEAT INTENSIFIES
@eshance-09444 жыл бұрын
Noice coment
@froJoss4 жыл бұрын
Some would say... DÉJÀ VU
@cmdraftbrn4 жыл бұрын
the tofu is safe.
@TheOwenMajor4 жыл бұрын
GAS GAS GAS
@RendallRen4 жыл бұрын
I recognize a reference, but I don't get it. Would one of you kind souls - you, yes you, reading this. Would you explain it to me, please? What is this "EUROBEAT INTENSIFIES" in reference to cup of coffee not spilling around the bend, and related DÉJÀ VU and GAS GAS GAS comments? I too would like to be a cool kid "in the know".
@rnrtruestories3 жыл бұрын
man i love your channel. I worked on the design side for almost 10 years for roads and bridges.
@gameimprovements43473 жыл бұрын
Facts.. This channel is amazing. That career you worked in seems pretty sick and underrated
@THRASHMETALFUNRIFFS3 жыл бұрын
Whoa... Hella */w\METAL/w\*
@khiladikumar4912 жыл бұрын
plzz..share some knowledge as I am going to face lots of interviews ahead
@kellenpdl2 жыл бұрын
how did you get started designing roads??
@khiladikumar4912 жыл бұрын
@@kellenpdl no
@visi98562 жыл бұрын
As an ex-Road engineer, great video! you covered up the basics very well! Just another thing to add, the transition length for straight to curve is also dependent on the transition length required to transition from crown to Super elevation.
@mark-ish4 жыл бұрын
9:17 Draws a perfect moose/deer, contrasted with a brick "car" 😄
@mbur50994 жыл бұрын
According to scale that deer is a BEAST too!
@booonesaaw4 жыл бұрын
@@timno9804 basically a Moose
@michaeljames46123 жыл бұрын
😂😂😂😂
@HarshRajAlwaysfree3 жыл бұрын
in physics we are too used to assuming moving objects as boxes
@rogerwilco24 жыл бұрын
Hills? What is this magic you're talking about? - The Dutch.
@Julia_and_the_City4 жыл бұрын
I saw one in Nijmegen once... Wait... Did I? Not sure, might have dreamt it.
@numericbin99834 жыл бұрын
@@Julia_and_the_City On the motorway from Maastricht to Eindhoven, I saw a few hillls. But the slopes were quite gentle.
@lenny62814 жыл бұрын
@@numericbin9983 impossible, you must have been hallucinating
@terryboyer13424 жыл бұрын
@@Julia_and_the_City Kids sandbox.
@thomasvlaskampiii68504 жыл бұрын
But, not all of the nation is below sea level. What goes down, must go up right? Well... I mean when your height is increasing by a centimeter over a kilometer or two, I can see how you'd never notice it
@stupidburp3 жыл бұрын
I noticed that the Autobahn in Germany had much longer on and off ramps, gentler curves, more reflectors on the sides, more signage, and a smoother road surface with less pooled water than I was used to from driving in the USA. It showed me that the details of how the roadway was designed could help safely enable faster typical speeds with fewer accidents. I have heard that the driver training in Germany is also more in depth and strict than in the USA which may also contribute to safety.
@seanthe1002 жыл бұрын
There's also fewer cars on the road in Germany there's about 500 per 1000, in the US it's over 800 so we have about 60% more vehicles on the road.
@MegaSnow1212 жыл бұрын
The Autobahn is in some ways easier to drive on once you realize the rules of driving 100 mph - safely. We were in Germany a few years ago, and I found the Autobahn easy and exhilarating - perhaps it helped that I was a CDL driver in my profession, though my 20-something son did just as well. The Autobahn is MUCH better built and planned than US highways. And safer despite the higher speeds.
@pleasedontmakememakeupanalias2 жыл бұрын
@@seanthe100 yes but you are missing the fact that germany as a whole is much more densly populated than the us (7x higher). we have fewer cars per person but still more cars per km of road resulting in much more traffic / more cars on the streets
@JaredMusil Жыл бұрын
You also need a license to play Golf in Germany
@wouldbfarmer2227 Жыл бұрын
Germany didn’t have to design their roads with drive-by shootings in mind.
@austindonley3754 жыл бұрын
Just took my route engineering class last semester and did a group project where we designed roughly 2 miles of a highway. Way more intricate that I ever imagined.
@andrebartels16904 жыл бұрын
I never cared about civil engineering until I found your channel. Now I gradually start to see the world I live in with different eyes. Thank you for widening my horizon 👍
@DonyoSanghelei302 жыл бұрын
Same. I’m a truck driver and the more I am on the roads and understand their design it makes me a better driver to anticipate traffic changes and better anticipate how other driver are likely to execute certain maneuvers that may be unsafe and allow me time to defensively drive.
@TheOfficialCzex4 жыл бұрын
Engineer: "... So, anyway, the most effective speed limit for this section of highway is 75 MPH." The State of Virginia: "35 it is then!"
@emeltea334 жыл бұрын
Highway patrol everywhere, just shooting fish in a barrel. Meanwhile, people drive 50-60 in front of my house where the speed limit is 30 mph.
@AlwayzPr04 жыл бұрын
At least Texas listened
@TurkishLoserInc4 жыл бұрын
Entire Northern VA is essentially pegged at 55. Past Quantico going towards richmond it magically becomes 70. I think it has to do with trying to escape DC, if something were to happen, the surrounding traffic would slow down your maximum getaway speed.
@MikeV86524 жыл бұрын
@@AlwayzPr0 Amen to that!
@speedyme2004 жыл бұрын
A well-designed up-to-date radar detector would help
@Baseit4 жыл бұрын
Love this video: I consistently think about roads and their slopes as I'm driving on them. Thank you for sharing so much of your knowledge!
@HylianDefender4 жыл бұрын
4:37 In Initial D, Bunta, Takumi's father, gave Takumi unique training. Every morning when Takumi delivers tofu, Bunta gave Takumi a cup of water to place in the drink holder. Bunta told him he could not spill even a drop of it while he was driving. Besides preventing the tofu from breaking, it forced Takumi to drive very smoothly along the roads.
@blakebiermann43164 жыл бұрын
Lane widening in curves is also very helpful when you're pulling a long trailer or driving something wide. Less chance of less skilled drivers getting too close to you
@jakurdadov6375 Жыл бұрын
There are design criteria for this. The sharper the curve, the wider the lane. We also consider the frequency of different vehicle types. It doesn't make sense to build very wide lanes for a vehicle that almost never visits the curve. Very wide lanes sometimes tempt drivers to pass where it is unsafe.
@MukulVyas54 жыл бұрын
I'm a Civil Engineering graduate and due to a monotonous, quality lacking, banal and unfair education system and working culture, I've lost interest but your channel keeps me motivated. Thank you so much :) I wish I had a teacher like you. This is how Civil Engineering should be taught. Thank you once again. :)
@nickjones08033 жыл бұрын
Keep at it brother!
@MrFranco11983 жыл бұрын
Couldn't have said it better myself
@randomgaming20794 жыл бұрын
Never would I have thought 5 years ago that I would be a Civil Engineer. And here I am now Sat as an Undergraduate Highway Engineer literally understanding and designing everything that is being talked about in this video.
@EzraEats2 жыл бұрын
As a recovering truck driver, I absolutely love your videos on roads and highways. I've always loved the interstate system and find all of these nuances so fascinating.
@TheAssassin4094 жыл бұрын
This Traffic Engineer approves this video. although i must mention that set speed limits are mostly political.
@JustJoshtheDad4 жыл бұрын
This DOT inspector 2nds that.
@nicholascrass25554 жыл бұрын
Do you then receive a speed limit design requirement and engineer to it? Or are speed limits sometimes set regardless of the road design?
@imaginerus4 жыл бұрын
As an electrical engineer, I always get excited to see a circuit I designed assembled on a PCB in reality, even though it doesn't really matter how it looks. I can only imagine how it feels to drive on a road you have been designing for month on your desk!
@YathishShamaraj4 жыл бұрын
In India almost no one respects the set speed limit, it's the geometry of the road that forces us to stick to a certain limit (usually not as per the set limit). Speed limit is only followed within city limits (that too not very well) 😔. But that's India, 😉
@Numbnuts0074 жыл бұрын
I've always wondered this, especially since on US highway 19 in Florida which is near my hometown, the set speed limit is 55 mph, but nobody goes that. They either go 60 or 80 depending upon which lane they are in. And if they're not a local, they go 55. I've always wondered why it was 55 when nobody goes that speed limit, and now I have my answer. It's probably political. Why does politics have to ruin everything?
@ericcheese75944 жыл бұрын
+15 during pandemic, -20 during rush hour.
@captaingreenhat4 жыл бұрын
More like plus 50 and minus 60 here in austin texas
@Jorti1boomboxvideos4 жыл бұрын
75mph speed limit: +40 california day time +70 california night time -100 California traffic
@ForestFire3694 жыл бұрын
Bro you can go as fast as your vehicle will take you in an empty 60 zone lmao
@YagiChanDan4 жыл бұрын
Try central London.
@imthedarknight-87554 жыл бұрын
T V- I feel like my cops are bored though, I've been pulled over twice for speeding during quarantine when I've been doing the same I've always been
@eljefe6211 ай бұрын
In my area, there are two super curves and it constantly amazes me how drivers do not understand that it isn't necessary to slow for them. The posted speed never changes or is warned, yet the majority will slow by 10 MPH as though they are taking a tight flat curve. Taking these curves at the posted speed barely even provides any noticeable centrifugal forces on the body. Great video! I learned about some of these from a roommate who was a surveyor/engineer who had graduated from Purdue. I've never forgotten those things and think about them often as I drive.
@w6wdh2 жыл бұрын
A couple of additional points from a friend who’s a land surveyor. Excess or insufficient fill dirt is an expensive problem. Roads in hilly areas are designed so the volumes of cuts and fills approximately match. Crests and dips are given parabolic profiles with tapers at the transitions, for smooth vertical accelerations, to avoid feeling as if on a roller coaster ride. (I know of a couple of hilly roads that are fun to take fast, for a feeling of partial weightlessness!)
@ColinRichardson4 жыл бұрын
8:44 happened to me in Finland in a rental car. Reindeer were like Ninjas. Popped up out of nowhere. They like to eat the salt on the road apparently.
@JesusCliment4 жыл бұрын
In Finland speeds limits are reduced during winter in many roads and highways to account for the ice and the increased breaking distance, to avoid crashes with reindeers and moose. Also, they have experimented with salt statues near the reindeer paths to attract them out of the roads.
@Mireaze4 жыл бұрын
Teenage Mutant Ninja Reindeer
@Triadii4 жыл бұрын
Why do they like eating salt?? 😂
@cmdraftbrn4 жыл бұрын
@@Triadii water retention.
@ColinRichardson4 жыл бұрын
@@JesusCliment I was already going way under the speed limit.. Since I was driving on the wrong side of the car, on the wrong side of the road, snowy conditions.. And it not being my car.. I was being super cautious... Thou according to the locals, that wasn't considered snowy.. I guess it's when we in the UK say "this isn't rain" though someone in a desert would call it a storm.
@filippe9994 жыл бұрын
The citizens of my city in City skylights will enjoy my newfound knowledge
@wrex5094 жыл бұрын
I enforce rigid 90 degree turns. Lol
@warriorsmustang17844 жыл бұрын
@@wrex509 Im not taking any advice from this video. I'm still going to set the speed limits to 120kph with 50 degree bends downhill
@jaredcadz3 жыл бұрын
Hahaha! Hilarious! 😂
@nunaoooo3 жыл бұрын
This is beautiful. Roads in Brazil are generally bad so when I drive in a well built highway, I actually think about how good they are. I love your explanation on speed limits, everyone should understand that. It should be on every class when getting our driver licenses. Instead, we got maniacs driving like they are in a racetrack, putting everyone else in danger.
@muhammad.umair4473 жыл бұрын
As a student of civil engineering i am enjoying it very much salute to your effort and hard work for making such amazing videos
@noonehere43324 жыл бұрын
Step 1: design the road to be able to handle 100+ mph Step 2: set speed limit to get maximum revenue.
@gameonyolo14 жыл бұрын
do they teach that in college?
@ahumandoing68134 жыл бұрын
@@gameonyolo1 No, college is for keeping people ignorant. It's not until you get involved in the corrupt workings of government do you learn such tricks.
@bunchycarter80244 жыл бұрын
@@ahumandoing6813 the college you went to was definetly intended to keep people ignorant
@elizabethwinsor-strumpetqueen4 жыл бұрын
@jocaguz18 -- baaa! baaa!
@whiteeyedshadow84233 жыл бұрын
@@bunchycarter8024 I am going to remember that flip around burn format for the rest of my life Thanks bud
@Uruduin4 жыл бұрын
What I'm hearing is no one from the New England area have studied any of this and just did whatever
@tomsko8634 жыл бұрын
Add Florida to that list. From looking at a map, you can only conclude that they didn't own a ruler and used a live snake instead when designing their roads. No one cared about sight-lines or efficient design, they were going for this pseudo-flowy feel that makes driving very dangerous. FU Florida. Sink into the sea already.
@BobSmith-gk9vs4 жыл бұрын
Nor does anyone in Washington State, some of the worst road designs imaginable.
@ralanham764 жыл бұрын
The town I live in Florida was drawn with the spirograph the roads come off the highway perpendicular at first then immediately start crisscrossing see you can’t even drive straight across town you have to drive at 45° to the left and then 45° to the right and then another couple miles at 90 to the left
@prestondial19924 жыл бұрын
I always though that New Hampshire and Florida has crazy roads, and then I moved to LA and realized that I knew nothing
@Hyrum_Graff4 жыл бұрын
David John partly because the original roads were designed for horse powered travel, and any crashes would be at a lower speed and less frequent anyway.
@lesflynn44553 жыл бұрын
I discovered this channel today, and it's bloody fascinating. Grady is answering questions turning around in my head for most of my adult life, which I've been too lazy or preoccupied to seek the answers for on my own.
@tonysuda90663 жыл бұрын
Me too.. I've seen the ship crisis in detail and now im more aware that there is so much more
@TheCuriousNoob4 жыл бұрын
Your series is so interesting and makes me appreciate infrastructure engineers and construction workers so much more.
@Claerti4 жыл бұрын
"In an ideal world every road would be a straight, flat path with no intersections, driveways, or other vehicles at all. We could race along at whatever speed we want!" Definitely an engineer
@planetfall50564 жыл бұрын
"Look, all I want is for cars to be uniform spheres moving in a vacuum, is that too much to ask!?"
@kumar14004 жыл бұрын
Always look for ideal conditions. Andddd then add all the losses to the equation 😬
@Speed0013 жыл бұрын
Speed limit would probably be 1% lighspeed in a vacuum for safety purposes due to human reaction speeds.
@Speed0013 жыл бұрын
@@planetfall5056 Wait, why spheres? Hahaha.
@joeyager84793 жыл бұрын
I80 across the Great Salt Desert in Utah comes close to this ideal. 57 miles between exits and mostly straight & flat.
@thenotflatearth27144 жыл бұрын
UK: our speed limit is 110kph, drivers can drive safely on highways France: our drivers can go a bit faster, 130 Germany: *puts down bong. *now here me out guys*
@gameonyolo14 жыл бұрын
dedass though we should all have that system
@imthedarknight-87554 жыл бұрын
Nikita K yeah I'm not sure why interstates in the middle of Nevada (perfectly flat, no bends, no intersections, long sight lines) even have speed limits. Seems like you could go 120mph just fine, I've certainly done it on worse highways and didn't feel like I was in complete panic
@05Forenza4 жыл бұрын
@@imthedarknight-8755 Engineers/politicians could complain all day that cars weren't designed for the speeds. Which is totally false. How many of our vehicles are also sold in Germany? You can't have something deathly unsafe at 130-140mph when that's the flow of traffic. It wouldn't pass their safety tests.
@user-sq1nc5ot8m4 жыл бұрын
IMTHEDARKNIGHT - I think it's simply due to the fact that it is so barren. One fuckup and a hospital can't help. Edit - also on two lane highways people have no problem attempting to overtake with oncoming traffic.
@Stettafire4 жыл бұрын
@@05Forenza It depends. There are some cars here in the UK that struggle at 70. Toyota Yaris comes to mind, it doesn't like high revs, that car. Also a few others are a bit sluggish. But, you are right mostly, I think. Most cars are capable of driving at higher speeds, it's just a question of the driver and the road. No sense in doing 110 m/h around a tight bend on a country road, but on a motorway? Maybe.
@ImTheDudeMan47119 күн бұрын
As a "Planning" graduate student, I will always remember my graduate school traffic engineering professor. I've never met an angrier man. At the beginning of the course he stated "Planners" shouldn't be allowed to take his course. Any question I had was was a waste of his time. I was refered to the engineering college dean for asking why "pedestrians selling goods factor at intersections" wasn't included in the cost assessment. He thought I wasn't a serious student and deserved a dean's reprimand. To this day, I remember this every time I make a discretionary judgement involving traffic engineering.
@chaotcmind4 жыл бұрын
This was my Road Construction class summarized in 12 minutes lol
@mureithikivuti2 жыл бұрын
IKR. So weird!!!!
@LMacNeill4 жыл бұрын
How are speed limits set? Government official: "We can extract the maximum amount of money from the peasants by setting the speed limit to 55 and handing out tickets like candy." Engineer: "This road is designed to safely handle traffic at 80 mph." Government official: "Ok. 55 it is." Engineer: "But..." Government official: "Like candy..."
@raymond2894 жыл бұрын
55 mph 90km/h comfortable for old Grandpa and Grandna on Highway. Including if 1 or 2 car suddenly breaks down. motorist get enough thinking time to move OVER. easy to manage construction on the road. Low Speed Limited Dangerous points People drive Sleepy some people clam unable to Operate at 75 mph 122 km/h. Faster Highway Longer Off ramps and Extra right lanes. Prefers a Off Ramp Dividers. Faster Highway required to have 2 speed limit Car and Truck speed limit. Truck brakes distance required 3.5 uoward 9 x distance to stop. Compared to a car at same speed. North America Canada & USA hand out license to anyone able to walk. You don't see European countries crash cars as much as Canada or USA. Strict driver license standard. Farm style driver licence system. Not everyone live in Horse Town or Horse City. This is numbers Reason of Car Accident Accountability on Driving School, license Systems.
@josephburchanowski46364 жыл бұрын
@Paul Kian Long answer short. US highways aren't actually designed for 80mph speed limits. As there are other designed requirements that would be used if such were the case. . Also there are a number of factors that make 80mph speed limits less safe than 55 mph speed limits. Such as lax driver license tests, old people, sleepy people, construction, cars breaking down, and more.
@Randomguy-ch6je4 жыл бұрын
There’s a road near where I used to live that’s divided like a freeway and designed for 45mph. It has a 25mph limit(used to have 35). The cops love it. I can barely go 30, the road just encourages speed.
@Puckosar4 жыл бұрын
Ya you hit the nail on the head with that one
@mjc09614 жыл бұрын
@@raymond289 "North America Canada & USA hand out license to anyone able to walk." Dude, I wish North America was that strict with handing out licenses. Might be a few less idiots who come to a near complete stop before a simple 90 degree right turn. Maybe less idiots who think it's cool to drive in the middle of the road when there's no painted lines, too.
@maxximumb4 жыл бұрын
Grady, please could you do a video on why parking lots are designed the way they are. It always seems that they are full of choke points. Is there any actual thinking or design beyond maximum capacity?
@akonnema4 жыл бұрын
Omg I think about this topic all the time. It seems like they are designed to be as annoying as possible sometimes. Also I kinda hate walking in most parking lots it just feels very unsafe.
@edcrichton94574 жыл бұрын
Well, depending on where you are, parking lots don't have to abide by same rules as roadways.
@MrMattumbo4 жыл бұрын
Worse is the parking garage at my work, it's designed to be driven both ways yet it's not wide enough for two cars to pass at the end of the ramp and people with trucks always decide to park at the edge spots further limiting one's turning radius and vision. It's a fucking nightmare.
@estellethewhitemage3854 жыл бұрын
@@MrMattumbo In the U.S. the average cost to build a multi-level parking garage is ~$30,000 per parking space. With a price tag so high, the owner of the parking garage is surely going to design tighter traffic flows to maximize the number of spots. Spots that could be used for high-rise tenet parking spaces, parking for shoppers at a mall, etc.
@MrMattumbo4 жыл бұрын
@@estellethewhitemage385 Well this is just an office complex with a few data centers on the site yet they have 5 three-level parking garages packed to the gills with spaces. This wouldn't be an issue but they marked it for two-way traffic even though it has two lanes going up the ramp and a lane on each side of the levels so it could and really should be set up for one-way traffic flow since they decided to make it dangerously tight around the bends. There is literally no way for traffic to pass each other, either someone yields and tucks in or their will be an accident. Right now the place is under construction so who cares, but once office workers start banging up their cars I suspect they'll change it.
@admiralcapn4 жыл бұрын
8:08 - "I'm...pretty tired...I think I'll go home now."
@AliceHollend4 жыл бұрын
"Here's how a perfectly designed highway is made." Russia: "Hold my vodka while I dig some more potholes"
@nittygrittytalks59993 жыл бұрын
Russia: "let's fix some asphalt in winter to make driving even more enjoyable"
@4IN140944 жыл бұрын
"Your cup of coffee won't spill at all around the bend" *Eurobeat intensifies*
@F3Ibane4 жыл бұрын
Grady: On today's episode we're talking about roadway geometrics and the shape of highways. Me: *F#&k yes, we are!*
@yhoo4 жыл бұрын
This video is great. Thank you so much for doing this that I, as a lecturer of this subject, can use the link for teaching my students, giving a description about designing the geometry of highways.
@SRutcosky133 жыл бұрын
ever since i’ve found this channel, i’ve become way more interested in how the world is set up to work. thank you so much, Grady!
@TheDarkKl3424 жыл бұрын
2:06 You would never put a 100kph speed limit on a city street Russia: hold my beer FYI : in russia you can somewhat legally drive 20 kph over the speed limit. Old road cameras were very inaccurate in detemining car speeds and could even mistake small cars for cargo trucks, so this +20 kph limit was added . Modern cameras are much better, but this thing is still present for whatever reason. This means that one can drive past a camera at 55 kph when the limit is 40 and be fine
@TheBurzhuy4 жыл бұрын
Don't tell bullshit. There are no 100+ km/h speed limits on Russian city streets. It is said that maximum speed within any city, town, village etc is 60 km/h. The Government gave people 20 km/h window without fines but it doesn't say that speed limit is 80 km/h. In usual life you wouldn't be fined if you were within this 20 km/h window. BUT for example, if you hit another car and the police found out that you'd moved over speed limit you could be chosen as a person who was the cause of the accident because you've broken the speed limit. In that case you wouldn't get any payments from your insurance company to repair your car but the insurance company would pay to the people whose property you'd damaged and only about $5700 max (third party liability insurance), everything above that value you would have to pay on your own.
@mmycan4 жыл бұрын
Formally the speed limit is 60 km/h but we can move with 79 km/h without fine, and even for 99 km/h the fine will be $3,5 with discount. So practically we have some individuals moving with such a high and dangerous speed in our cities.
@allan90954 жыл бұрын
Very similar in Ontario Canada, though I don't know the reasons behind the laws.
@georgobergfell4 жыл бұрын
@@allan9095 wasn't a guy going 300kph+ a couple of weeks ago in ontario?
@LohTec4 жыл бұрын
In the US it isn't a hard rule, but generally you can go 7mph (11kph) higher than the limit. But if you find someone behind on their ticket quota, they could ding you.
@mattm72204 жыл бұрын
While this was incredibly interesting and very well delivered (as usual), I feel like the video title should be "How Are Roadways Designed?, since he never actually talked about how they use that information to calculate a speed limit for the road. I was really curious about what sort of speed guidelines those different roadway aspects have, yet that was never mentioned. Would love a follow-up to this talking about that side of roadway design - like, how does the radius of a curve affect that safe speed, and does that safe speed change based on that number of curves in a given distance, etc.?
@emeltea334 жыл бұрын
@9:56, politicians determine it, so they can ticket you, at least in Virginia. Huge, descent highways' speed limit: 55 mph. Highway patrol shooting fish in a barrel.
@StealthNinja45774 жыл бұрын
Yea... he can't really do that since the speed limit is arbitrary decided by various communities and politicians. There's a theoretical max speed you can go depending on your driving ability, road curvature, and road conditions. Typically that's way higher than the posted limit. Often this is exploited for revenue with some towns having a couple hundred speeding violations every week for 100-300 a pop. Often it gets capped at 300 because security clearances check for any fine over 300 to work at various corporations.
@mattm72204 жыл бұрын
I didn't actually realise it was so heavily based on politics/revenue that the calculations, and theoretical maximums don't matter at all - though the theoretical maximums based solely on numbers would be really interesting 🤔.
@StealthNinja45774 жыл бұрын
@@mattm7220 yea speeding is really a self correcting problem. People don't typically just live their lives a quarter mile at a time so there's a natural distribution to how fast people will travel any given road during any condition. Usually raising a speed limit decreases the number of tickets issued, accidents stay the same, and accident fatality increases to correspond with the fact you're flying down the road in a metal box faster.
@Cyberguy424 жыл бұрын
I too thought the video did not answer the question posed by its title
@sonyacowles85973 жыл бұрын
When you said "You're probably not thinking about the road, unless there's a problem..." I thought "I do." And then you went on to say "Unless you're just curious, and interested in how things are made." Made me chuckle, and seen. Thank you. lol And many times I've said a silent thank you to an unknown engineer, as I'm driving, for the sheer joy of driving certain roads. Knowing that they gave thought, and attention to the curvature, slope, etc. Gliding along, and-and you said-for even a ripple in my coffee. I honestly think "Art as engineering." 😊
@Canuck10004 жыл бұрын
Overall, it provided a good summary, but here are some important issues/comments: As someone who teaches highway design at a top engineering school in the US, it is incorrect that spiral transitions are always needed for horizontal curves. Many state DOTs don't use them because they are more complex to build in the field (not about using the equations, but staking them in the field via surveying). They are not technically needed because drivers make their own spirals as they enter the curve. I always give to my students the example of a Formula 1 race car that enters a horizontal curve, where the car moves away from the inside edge before the curve, and moves inside the lane as it enters the curve in order to distribute the centripetal force. It is easier to see how Formual 1 drivers do their own spirals. On the topic of safety, studies that have examined the safety effects of spiral transitions have been mixed. The only time lane width can be widened on horizontal curves are on two-lane highways. It is very rare that the lane width is widened on multilane highways for horizontal curves. Technically, the design speed should always be higher than the posted speed limit. Unfortunately, for old highways, the posted speed is often higher than the design speed that was used at the time the highway was designed and built, especially on rural two-lane highways. This explains in great part why more crashes occur on these highways. I agree that designing a highway is an art and it is important to design it from the driver's perspective. Finally, all designs need to follow, as a minimum, the national guidelines (AASHTO Green Book), but state and local guidelines can go beyond the national guidelines. If you cannot meet the minimum values, you need to ask for design exceptions, design waivers, etc. Each state has its own process for approving the exceptions, waivers, etc.
@Julia_and_the_City4 жыл бұрын
Brady, an engineer: "in an ideal world every road would be a straight, flat path with no intersections, driveways, or other vehicles at all. We could race along at whatever speed we want!" Me, an urban planner: "well yes but actually no."
@hoguemr4 жыл бұрын
*Grady
@i.i.iiii.i.i4 жыл бұрын
Me as a German: "well no but actually yes."
@MsDangerousBeans4 жыл бұрын
Me, a motorcyclist: "oh hell no!"
@RusticKey4 жыл бұрын
Me, as a pedestrian: Well, yesn't
@jmbpinto734 жыл бұрын
NO, i like the variety of landscape and to do my driving along the way.
@OeMpaK4 жыл бұрын
I play City Skylines, so this kind of things excites me
@Taladar20034 жыл бұрын
Funny, it is the opposite to me, the more videos on urban planning and road design I watch the more shallow games like that feel.
@ZadieBear4 жыл бұрын
You want some real fun? Download your Dept of Transportation's Design Manual.
@daniel_ghax4 жыл бұрын
Same.
@danceswithcarsdc3 жыл бұрын
Modifications for bicycles , pedestrians, trucks & buses may tell a different story, especially with Vision Zero.
@dennisdeng30454 жыл бұрын
I wonder if there's a video on the geotechnical aspect of road design too. It's important to know what lies beneath the proposed route.
@jadelu25424 жыл бұрын
Civil Engineering student here! A year ago, we had our subject "Highway Engineering". One of the big requirements to finish the subject was to build a 25 kilometer road on terrains/ mountains. We had no idea to start the project, and we basically have everything on our own. This video gave a background on how to do it, and can help also others!
@orchdork7753 жыл бұрын
Wait, you had to build an actual road, or just design one?
@Serahpin4 жыл бұрын
"In curved sections, engineers make the outside edge higher..." Driving through Georgia, I've found many roads where the outside edge is _lower_ and you feel like you're going to fly off the pavement.
@anzman9116 ай бұрын
That's a safety feature, so you don't drive too fast 😂
@Daniel-SlaveofJesusChrist4 жыл бұрын
When u are going up a hill, through a sag curve not just a stalled vehicle or animal, even a curve could take u by surprise
@raygrinders39183 жыл бұрын
Two questions: 1. How does an engineer apply spiral easements to two directions of a road at once? All the examples seemed to use a one-way curve scenario. (Super-wide lanes?) 2. Does a yellow speed limit sign for a curve reflect the engineer's opinion? I believe these signs are placed as a gauging system for various sizes of vehicles on various curvatures rather than announce a speed limit which the cops would enforce. ("Trucks Go This Speed. Motorcycles Keep Going Fast But Beware Slow Vehicles!")
@theondono4 жыл бұрын
When a civil engineer has a better oscilloscope than you do at your work as an EE 😭
@lavitaebella65613 жыл бұрын
I am from Romania, I am 19 and I bought last year an oscilloscope for 500 euro. It is a Siglent SDS 1104X-E.
@EvilSandwich3 жыл бұрын
I still use a phosphor tektronix from the 80s that I got second-hand when my high school was going to throw it out for a much more advanced model. She still serves me well but I'm also just a hobbyist LOL
@Racingboom4 жыл бұрын
I’m still so amazed how little subs Grady has with the quality and variety of content he creates.
@jranoco43824 жыл бұрын
So I'm studying highway surveying and transportation engg subjects right now and I stumbled into this interesting video.
@Iowagrown1233 жыл бұрын
Nice thought, to make curves more gentle, to be able to be able to see farther around a curve. But, run in the mountains, they're more limited to cost and geography and topography. Running the mountains with a loaded rig makes things interesting sometimes. VERY tight switchbacks and steep grades.
@ryleyh11854 жыл бұрын
"Roads rarely traverse areas that are perfectly flat" Nebraska - "Am I a joke to you?"
@bobthecannibal14 жыл бұрын
On the highways and interstates, sure, because "Good placement by highway engineers". When you get to the more local view, though, there's elevation and hills due to river valleys.
@HarmanRobotics4 жыл бұрын
I guess you haven't been to Nebraska, maybe you were thinking of Florida?
@mirzaahmed65894 жыл бұрын
Nebraska isn't flat.
@DestanyBrown4 жыл бұрын
I drove through Northern Nebraska and it's rolling green hills!
@utetopia16204 жыл бұрын
Funnily enough, of the 5 longest straight stretches of road in the world, none are in Nebraska. I once drove the 90 mile straight in Australia. It kinda kinks at the end, then continues on straight. Thats just because they started building it from each end, and were slightly out by the time they met up, so they had to do a bit in the middle to reconnect them!
@IainHendry4 жыл бұрын
Your explanation of spiral transition curves is the best I've ever heard - thank you! These are used in railway and roller coaster design as well.
@ankurage3 жыл бұрын
The degree of complexity in civil engineering is just incomprehensible, these engineers must be some sort of superhuman
@aaronwith29502 жыл бұрын
You know this is good when I already know all this info, but still re watch all the episodes like every 6 months.
@suhaskodali87074 жыл бұрын
"Engineers follow guidelines on curves to make sure they are sufficiently gentle" Massachusetts: we do what now?
@TheChemicalWorkshop4 жыл бұрын
greetings from Germany ^^
@edgeeffect4 жыл бұрын
kzbin.info/www/bejne/rl6qY2ufrrWnsJI
@JF-fx2qv4 жыл бұрын
60 - 110 is the limit. Lanes are king.
@dasBunny994 жыл бұрын
@@JF-fx2qv There is no 110mph limit, the highest in use is ~80mh. After that there only is unlimited.
@varunprakash6207 Жыл бұрын
Highway Designs by its curves and The elevation of the road and safety of roads by barriers on the sides and Highways design is an art 🎨 by engineer and its so many factors make it comfortable for drivers and make it fast smooth safety rides and Practical engineering explanation in simple way 👌 with real time road Design in the world and it's problem 🙏
@Charlezard.4 жыл бұрын
In Hampton Roads, Virginia, the way highways are designed is they take the normal plans from every other city, then redraw them backwards. In every other city, freeway ramps flare out, but in the Hampton Roads cities, the Ramps turn in on eachother and the on ramp and exit are on one, dangerous lane.
@gijs_k37374 жыл бұрын
Roads in the US are poorly designed in general. Not the road itself, but the design of how to get everybody and not just car drivers to their destination safely. The US has a complete lack of traffic calming, separate bicycle lanes, roundabouts and ringroads. Everything is designed in such a way to make it as safe and easy as possible for cars, but pedestrians, cyclists, trams and busses are left to fend for themselves. When you look at a country such as the Netherlands you will see speed humps, bicycle prioritized roundabouts, merging lanes, speed bumps and special curves to slow down cars. The result is that the amount of traffic accidents per capita is far lower then in the US. Traffic jams are still common, but not as much compared to the US since many people use different means of transport since the car isn't prioritized. In fact, car accidents where more then 1 person dies makes it into the National news and the place where it happened gets a complete review by the government to see how they can prevent it from happening again.
@JeffDG4 жыл бұрын
"based on terrain, traffic, existing obstacles, and of course, safety" You missed a critical factor...the local government's need to collect revenue from speeding fines...oh, wait, that's not the engineers who do that one...nevermind.
@crisu10724 жыл бұрын
You should get the day find system lol
@UrFavSoundTech4 жыл бұрын
There are two sharp 90° turns by my house. I can normally see the whole turn. But the corn is near full height in the fields next to it.
@ncot_tech4 жыл бұрын
There's an off-ramp near here that merges with a regular road on the "wrong" side (I'm in the UK, we drive on the other side of the road, side roads always merge from the left. This one merges from the right). If they've cut the grass on the side of the road it's easy to see any cars coming, but when the grass is long it's possible for even small trucks to get hidden until they suddenly appear from nowhere.
@moonasha4 жыл бұрын
this happens near me but with cattails. Gotta basically pull into the road to see
@visi98562 жыл бұрын
Roads with low design speeds can have sharp turns. They don't even need to have superelevation
@vipahman3 жыл бұрын
You forgot to mention the random speed limits on almost identical roads in different states that make absolutely no sense. And the slow disappearance of passing zones because of reduced driving skills.
@MegaSnow1212 жыл бұрын
Fascinating video. I did not know how much goes into designing a road, and loved learning more. If you have ever driven on I-5 northbound or southbound just south of downtown Portland, Oregon, you drive through a bad stretch of highway called the Terwilliger Curves, a short stretch of sharp curves with three lanes of traffic in each direction. The curves were built before more stringent regulations were in force, and, though the state has made improvements, frequent accidents still happen. I would love to hear your take on this appropriately 1/2 to one mile stretch of I-5.
@sergeant58484 жыл бұрын
You said "Centripetal Force"- Oh Grady, I love you! You are a true Engineer.
@tuliomg1234 жыл бұрын
As an avid CitiesSkylines player and an emigrant in Sofia (Bulgaria), I have to say that I do pay a lot of attention on road design. Both for my personal pleasure and to be able to navigate in horrific designed city traffic.
@msquaredmedia87174 жыл бұрын
I love cities skylines it's great to watch trucks up a mountain!! Where did you move from if you don't mind me asking? My brother emigrated to bulgaria too (from the UK) :) I've not explored Sofia much at all just drive through it.
@scoops22 жыл бұрын
"If you're thinking about the roadway itself at all while driving, it's probably because it was poorly designed" - Every road in Montreal
@merrymachiavelli20412 жыл бұрын
It'd be interesting to know how modern engineering best-practice compares with more organic roads. Whilst most roads, and especially highways in the US were purposefully designed with cars in mind, in large parts of Europe and Asia, the course of roads can be literally thousands of years old. Driving along country roads in the UK is an endless odyssey of ups, downs and turns (usually flanked on all sides by hedges or trees, that often overgrow the top of the road to create a 'green tunnel' effect that I personally love).
@herrschaftg352 жыл бұрын
Modern roads are not built to last, contractors build them to guarantee job security via inflated government contracts.
@jakurdadov6375 Жыл бұрын
@@herrschaftg35 Contractors generally don't design the roads. In my 40 years of practice, I have worked as a consultant to the state. In that role, I design the road and prepare the plans. I deliver the plans to the state, and they hire the contractor to build the road. The contractor cannot deviate from my plans without my approval. I get paid according to the effort involved, and there is no relationship to the cost of the construction.
@jakurdadov6375 Жыл бұрын
Most very old roadway alignments follow the foot and car paths developed long ago. These paths generally follow the dry route, the route that is rarely washed out in most weather conditions. That is the reason they are so circuitous; they follow the natural topography, which never follows our rules or works to our convenience.
@reggiep754 жыл бұрын
0:26 - Arrgghhh the YT compression soup.. As for your good video, and me - a procrastinative critical thinker, I think way too much about things like this and the justification for the way things are and often end up speculating loads without reaching a solid answer and yet my thoughts were 90% right. It's nice that I can tick this off.
@jack19544 жыл бұрын
Really enjoying your series on roadways so far. I really appreciate how you go into detail about all the different aspects of roads. 👍
@nerd_alert927 Жыл бұрын
Wow, so cool! My father in law was an engineer with the DOT in my state for 30 plus years. He was the head of the department that designed many hwys. Now, I understand why he was always on call and always stressed while working on projects.
@DriveI652 жыл бұрын
I spent most of my adult life involved in road design and your explanations are spot on.
@oracleoftroy4 жыл бұрын
You forgot the part where they figure out what the safe speed is and then lower it by at least 10 mph and build a speed trap so they can poll tax drivers.
@This_Is_Not_My_Username4 жыл бұрын
Allll of this work that went into finding the perfect speed limit by an engineer to be 55mph. Then the city comes along and slaps a 35mph speed limit on there as a speed trap.
@Eggwood_3 жыл бұрын
55mph is only good in america in the netherlands its saver altough i can ride 100 mph
@hippopotamus864 жыл бұрын
1:55 - In the UK, we have two way roads that are very narrow that only one car can fit at a time, with 60mph speed limits. Some idiots will believe since it's a limit, you can go that speed, but the truth is, you should only go as fast as it is safe to do so. Speed limits are there to protect pedestrians more than anything. Anywhere else comes down to common sense.
@EnjoyFirefighting4 жыл бұрын
the one shown at 1:58 has a limit of 50 mph despite all the hairpin turns which sometimes make it necessary that right-hand traffic will switch to left-hand traffic depending on the situation
@fraserhocks78593 жыл бұрын
Love your channel. Great to see this, as a geometric engineer (road designer) with over 30 years under my belt, Iv finally found a link that I can point people too when I try and explain what I do for living 😁. You beautifully described, in simple terms the complex nature of geometric design of road, far better than I could have myself (id bore you to death 🤭). You even discussed operating speed versus posted speed... Outstanding! Despite so many years in the industry, I constantly find it interesting the influences of geometric design and roadside features, on driver behavior.
@ricardomilos26744 жыл бұрын
Engineer: *think so hard for speed limit* Me: Deja vu
@croman4784 жыл бұрын
I’ve always wanted to be a road/ highway designer. I constantly look at the roads and highways I drive and think of better systems. Maybe in the next life. Thanks for the video.
@yrmoma4 жыл бұрын
Brady: You have to consider rain when designing a road. Nevada: lolwut? Water from the sky?? Brady: You have to consider hills when designing a road, too. Kansas: I would really rather not.
@kylehart8829 Жыл бұрын
A perfect banked road is so satisfying. Holding the wheel completely straight and sticking perfectly in the lane is way more fun than it should be.
@Nveas154 жыл бұрын
What took me a whole semester to grasp has been revealed to my mind in just 12 min.. awesome content mate! Keep it up ;)
@madcatlover75544 жыл бұрын
3 second rule is essential, keeping that has saved me at least 3 times from rear ending someone
@danieldaniels75712 жыл бұрын
In drivers ed I was told it was the two second rule, although I always like to give myself a little more.
@mcarrusa7 ай бұрын
The question I want answered is: Why do designers of surface streets place manhole covers directly in the path of every vehicle’s right wheels, instead of in the middle of the lane?
@scottsthaname14 жыл бұрын
The roads where I'm at are great... the way you contour from one curve to the other without having to slow down even when pulling a trailer and the steep down slopes go into long straightaways to ease brake usage... engineered art.
@thebamplayer4 жыл бұрын
*Title* : How Are Highway Speed Limits Set? *German Autobahn* : WhiCh SpeEd LiMiT?
@JF-fx2qv4 жыл бұрын
There is a speed limit on the Autobahn. More importantly is to respect the lane you're in based on the speed you are traveling. This is something most Americans can respect.
@skirata31444 жыл бұрын
J F you shouldn’t base your lane on your speed, you should simply always be in the rightmost possible lane.
@luxshokk4 жыл бұрын
@@JF-fx2qv Well there are parts that have a speed limit and there are parts that don't. The special thing about the Autobahn is that there is no GENERAL speed limit which would take effect if there was no explicit speed limit. So Germany is still the country to come to if you legally want to max out the speed of your car on a public road.
@roadrunner62244 жыл бұрын
J F you should always stay the furthest to the right, if you aren’t overtaking. No matter how fast you go. You can easily drive 250+ in the right lane.
@realcokejam4 жыл бұрын
Narrator: "Highway design is an art form." *laughs in Houston area highway design*
@danieldaniels75712 жыл бұрын
Hey now… the Katy Freeway is high art. Much like a horror movie.
@dmcarpenter30972 жыл бұрын
Hey dude I know this video is from 2 years ago but I hope you get this message. I love watching your videos with my kids and explaining the stuff to them. You are awesome